One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(17,18,20,25,21,22,30,24)(19,26,29,31,28,32,27,23)(1,3,4,8)(2,5,6,7)(9,10)(11,14)(12,13)(15,16)(18,22)(23,31)(24,25)(26,32)(10,13)(14,16)(17,19)(18,23)(20,27)(21,28)(22,31)(24,26)(25,32)(29,30) involution — undirected(9,11)(10,14)(12,15)(13,16)(17,20,21,30)(18,24,22,25)(19,27,28,29)(23,26,31,32)(11,15)(14,16)(17,20,21,30)(18,24,22,25)(19,27,28,29)(23,26,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.